Fix: Add apscheduler dependency for LiteLLM cold storage logging

- Add apscheduler>=3.10.0 to dependencies
- Fixes LiteLLM error: No module named 'apscheduler'

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -41,6 +41,7 @@ dependencies = [
     "openai>=1.76.2",            # ✅ 核心 (7+ 使用)
     "tiktoken>=0.9.0",           # ✅ 核心
     "litellm>=1.60.0",           # ✅ 核心
+    "apscheduler>=3.10.0",       # ✅ LiteLLM 依赖 (cold storage logging)
     "langfuse>=3.0.0",           # ✅ 核心 (15+ 使用)
     "langsmith>=0.3.38",         # ✅ 核心 (12+ 使用)
     "langchain>=0.3.0",          # ✅ 核心 (text splitting)